单选题：The ISER is an institute that does research on pupils' perfo

题目内容：

The ISER is an institute that does research on pupils' performance in sport. A．Right
B．Wrong
C．Not mentioned

参考答案：

答案解析：

Many experts remain skeptical about his claims.

Many experts remain skeptical about his claims.A．untouched B．certain C．silent D．

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